Digital Commons Network^™

Synthesizing Octahedral Polyomavirus Capsids For Cryogenic Electron Microscopy, Miles Robertson

Fall Student Research Symposium 2020

Polyomavirus capsids are polymorphic under different chemical conditions. These capsids have been synthesized artificially using purified VP1, the primary building block of the capsid. Five VP1 proteins come together and form a highly stable structure called a pentamer, and these pentamers can form capsids (Figure 1). Depending on chemical conditions, the capsids can form three distinct sizes: T=7, octahedral and icosahedral (Figure 2). Only one form is found in infectious virions, and its structure has been well studied. However, no high-resolution structure of the octahedral capsid currently exists. The goal of this research is to solve the structure of the …

Dogs In The Home Improve The Quality Of Life Of The People Living Inside, Tanner Stevenson

Fall Student Research Symposium 2020

This poster explores how dogs improve the quality of life of the people they interact with. Regardless of underlying issues that the human faces, every dog helps to improve the situation of that human. From service animals helping to improve the quality of life of their owners in other ways than what meets the eye, to dogs improving the chance of allergy immunity for children, dogs impact the lives of humans for good. This project explores the way that studies have proven the worth of the dog in the home.

Enabling Mars Farms Through Microbial Remediation Of Wastewater, Tyler Wallentine

Fall Student Research Symposium 2020

This research evaluates the capacity of photoheterotrophic purple non-sulfur bacteria to utilize wastewater organics to grow and produce nitrogen-rich biomass. Inhibitory components of wastewater are determined. A scaled up production system is designed and utilized to culture bacteria in wastewater. The application of this technology in the production of agriculturally viable amounts of nitrogen-rich biomass is evaluated in the context of a Mars mission and enabling agriculture in a barren environment.

Isolation And Purification Of Bacterial Species From Rhizosphere Of Native Plant Ceanothus Velutinus (Snowbrush), Katherine Webb, Hayden Johns

Fall Student Research Symposium 2020

Due to the ever-changing climate, plants face stressors that limit their growth. Therefore it is vital to find new ways to protect plants from biotic and abiotic stressors such as pathogen infection, drought, heavy metal poisoning, and salinity. With an increasing population, limiting the effects of stress on plant growth and development for agriculture is vital. One approach to this is focusing on beneficial plant-microbe interaction, such as plant growth-promoting rhizobacteria (PGPR). These bacteria are found in the rhizosphere- the soil that is attached to the roots of a plant. Various PGPRs share a symbiotic relationship with plants and help …

Pathway‐Extended Gene Expression Signatures Integrate Novel Biomarkers That Improve Predictions Of Patient Responses To Kinase Inhibitors, Ashis Bagchee‐Clark, Eliseos J. Mucaki, Tyson Whitehead, Peter Rogan

Biochemistry Publications

Cancer chemotherapy responses have been related to multiple pharmacogenetic biomarkers, often for the same drug. This study utilizes machine learning to derive multi‐gene expression signatures that predict individual patient responses to specific tyrosine kinase inhibitors, including erlotinib, gefitinib, sorafenib, sunitinib, lapatinib and imatinib. Support vector machine (SVM) learning was used to train mathematical models that distinguished sensitivity from resistance to these drugs using a novel systems biology‐based approach. This began with expression of genes previously implicated in specific drug responses, then expanded to evaluate genes whose products were related through biochemical pathways and interactions. Optimal pathway‐extended SVMs predicted responses in …

Top 30 Full Text Downloads By Series For Fy 2020 (7/1/19‐06/30/20) Digitalcommons@University Of Nebraska‐Lincoln, Paul Royster

Institutional Repository Information

Top 30 downloaded series, UNL Digital Commons FY 2020 (7/1/19—6/30/20)

Library Philosophy and Practice (e-journal) • Historical Materials from University of Nebraska-Lincoln Extension • Robert Katz Publications • Nebraska Law Review • Nebraska Tractor Tests • Management Department Faculty Publications • Publications from USDA-ARS / UNL Faculty • Faculty Publications, Department of Psychology • USDA National Wildlife Research Center - Staff Publications • Textile Society of America Symposium Proceedings • Educational Administration: Theses, Dissertations, and Student Research • Electronic Texts in American Studies • Great Plains Quarterly • Public Access Theses, Dissertations, and Student Research from the College of Education …

Minutes, College Of Liberal Arts Faculty Meeting, Thursday, December 10, 2020, College Of Liberal Arts Faculty, Rollins College

The College of Liberal Arts Faculty Minutes

No abstract provided.

Lsomp: Large Scale Ordinance Mining Portal, Xu Du, Matthew Kowalski, Aparna S. Varde, Boxiang Dong

Department of Computer Science Faculty Scholarship and Creative Works

We propose a novel scalable Web portal called LSOMP (Large Scale Ordinance Mining Portal) to analyze ordinances and their tweets (of the order of thousands and millions). It entails commonsense knowledge (CSK) and natural language processing (NLP), disseminating ordinance-tweet mining results via interactive graphics and Question Answering (QA).

A Comparison Of The Efficacy Of Methane-Oxidizing Alternative Daily Landfill Covers And Policy Recommendations For Landfill Regulatory Agencies, Eric Lara

Master's Projects and Capstones

Methane (CH4) is a potent greenhouse gas (GHG) that has 28-36 times the greenhouse effect of carbon dioxide (CO2) over a 100-year timespan. Recent remote sensing research conducted by NASA Jet Propulsion Laboratory and Scientific Aviation has indicated that the working face of landfills are sectors of much higher methane emissions than previously considered. A working face location, which is the area of the landfill where daily waste is deposited, lacks the engineering controls present on the rest of the landfill. Controls such as gas collection and extraction wells and substantial covers to ensure surface integrity for methane leaks are …

On The Eco-Gender Gap, Haley Normandin

Honors Program Theses and Projects

The pressing focus on sustainability and the importance of climate action impels this project to examine whether and how gender and gender socialization shape perceptions of these issues. Drawing on survey data, from the 2016 American National Election Studies (ANES), I examine environmental awareness and activism, primarily through gender socialization.

2d-Att: Causal Inference For Mobile Game Organic Installs With 2-Dimensional Attentional Neural Network, Boxiang Dong, Hui Bill Li, Yang Ryan Wang, Rami Safadi

Department of Computer Science Faculty Scholarship and Creative Works

In the mobile gaming industry, organic installs refer to downloads that cannot be attributed to any advertising channel and thus do not introduce upfront user acquisition (UA) cost. Understanding the causal factors on organic installs is of vital importance for a game's ecosystem, as such knowledge can help bring in more organic users, who tend to be more loyal and active. A major challenge in discovering the causal effects is the potential temporal lag between an UA operation and the growth in organic installs. In this paper, we solve the problem by using a deep attentional neural network to analyze …

Item-Based Collaborative Filtering And Association Rules For A Baseline Recommender In E-Commerce, Jessica Lourenco, Aparna S. Varde

Department of Computer Science Faculty Scholarship and Creative Works

In the ever-growing data-driven world today, data increases in many forms, e.g. e-commerce sites uploading new products, streaming services adding TV shows and movies, and music platforms uploading new songs. It would be highly infeasible for end users to quickly browse all this data. Hence recommender systems can benefit end users (individuals as well as companies) in efficiently finding suitable products. Rather than making end users search through a vast array of items, recommender systems can suggest suitable items to users based on popularity of the items and the respective users' buying behavior. Accordingly, in this paper we explore two …

Transfer Learning For Decision Support In Covid-19 Detection From A Few Images In Big Data, Divydharshini Karthikeyan, Aparna S. Varde, Weitian Wang

Department of Computer Science Faculty Scholarship and Creative Works

The novel coronavirus (Covid-19) has spread rapidly amongst countries all around the globe. Compared to the rise in cases, there are few Covid-19 testing kits available. Due to the lack of testing kits for the public, it is useful to implement an automated AI-based E-health decision support system as a potential alternative method for Covid-19 detection. As per medical examinations, the symptoms of Covid-19 could be somewhat analogous to those of pneumonia, though certainly not identical. Considering the enormous number of cases of Covid-19 and pneumonia, and the complexity of the related images stored, the data pertaining to this problem …

Effective Ell Instruction And The Siop Model: A Comparative Analysis, Rachel Crow

Departmental Honors & Graduate Capstone Projects

Although English language learners (ELL) constitute the fastest growing segment of the U.S. student population, the majority of teachers are not prepared to meet the instructional needs of students learning English as a second language. The Sheltered Instruction Observation Protocol (SIOP) model has been a popular way of delivering ELL content instruction. I will be drawing comparisons and determining differences between the SIOP instructional model and what current research identifies as effective ELL instruction. The goal of this research is to identify possible benefits or drawbacks to using the SIOP model to teach academic language to English Language Learners, as …

One-Dimensional Turbulence (Odt): Computationally Efficient Modeling And Simulation Of Turbulent Flows, Victoria B. Stephens, David O. Lignell

Faculty Publications

One-dimensional turbulence (ODT) is an accurate and computationally efficient model for simulating turbulent flows. ODT has been applied to a wide range of flow problems including reaction, multiphase, differential diffusion, heat release, buoyancy, and wall flows. Applications include use as a standalone model and as a closure for large-eddy simulation (LES). Its strength lies in the ability to capture a full range of turbulent length and time scales. The ODT model is strongly coupled with its implementation, complicating its formulations. We present a modern, open-source, object-oriented C++ implementation of ODT. The code described here and made available online can be …

Laboratory Testing And Mechanistic Analysis Of Treated Subgrade Soils, Hari Kumar Reddy Yarrapureddi

Civil Engineering Theses

Calcium-based stabilizing agents such as cement and lime have been extensively used to improve the engineering properties of base and subgrade layers of pavement systems. Recently, polymers and chemical stabilizers have become popular due to cost efficiency, ease of application, and fast curing times. In this study, California Bearing Ratio (CBR) values of polymer and chemical treated soils were compared with the CBR values of soils treated with conventional stabilizers. Parametric sensitivity analyses was carried out on key parameters including the type of subgrade soil, stabilizing agent, stabilizing agent treatment levels, and moisture conditioning. Additionally, numerical analyses was performed to …

Interventions And Supports To Ameliorate Math Anxiety In K-12 Schools: A Meta-Analysis Of Experimental Group Design Research, Madeline Rose Hardy

Theses and Dissertations

"Math anxiety is commonly defined as a feeling of tension, apprehension, or fear that interferes with math performance" (Ashcraft, 2002, p. 181). Symptoms of math anxiety are reported by 33% of students by the time they reach the age of 15, possibly contributing to this workforce dilemma (Organisation for Economic Co-operation and Development, 2013). Many models and perspectives of math anxiety have been established including conceptualizing math anxiety as a function of working memory deficits, sociocultural conditioning, lack of reappraisal, and anxiety as a precursor to escape-maintained behavior. Math anxiety is more common in individuals with certain disabilities, such as …

Understanding The Role Of Atom Trapping In The Evolution Of Hydrocarbon Transformation Catalyst Morphology, Griffin Alexander Canning

Chemistry and Chemical Biology ETDs

Converting alkanes to other, more chemically and economically valuable molecules requires catalysts that can survive elevated temperatures and highly reducing environments. These environments can cause many metal-nanoparticle based catalysts to sinter rapidly, causing a loss of activity. They must also tolerate the coke formation, as well, since coke can restrict access to active sites by gas phase molecules, thus lowering catalytic activity. While there are routes to improve both the sinter and coke resistance of catalysts, an alternative strategy is to develop a protocol for regenerating the activity of the catalyst in question when coke formation or sintering becomes problematic. …

Instrumentation And Application Of Image-Charge Detection Of Electrospray-Charged Microparticles And Microdroplets, Jiuzhi Gao

Theses and Dissertations

Image-charge detection is emerging as an important tool to analyze heavy and heterogeneous samples because of its unique advantages in measuring highly charged microparticles. Conventional image-charge detection instruments include at least three fundamental components: an ionization source, an aerodynamic particle delivery system, and an image-charge detector. Here I report research efforts that investigated the mechanisms of image-charge detection and proposed some instrumental developments of these components to suit specific research purposes. In Chapter 2, I report an investigation of the electrospray ionization (ESI) mechanism based on an observation that a certain portion of charged particles generated with an ESI source …

Policy Changes Impact In Deforestation Of The Brazilian Amazon, Iara Silva Jaques

Master's Projects and Capstones

Since discovered and inhabited, the Brazilian Amazon has been explored and impacted negatively by human activities. The conversion of forest to pastureland and farmland, as well as mining activities, road opening, wood and ore extraction and fire are historically the main causes of environmental damages and forest loss in the region. This project overviewed the latest changes in environmental policy and practices towards environmental protection conducted by the Brazilian president Jair Bolsonaro, since he took office in 2019, and analyzed the progress of deforestation in the recent years under the new federal administration. Geographic Information System analysis were used to …

Student Perceptions Of An Inquiry‐Based Molecular Biology Lecture And Lab Following A Mid‐Semester Transition To Online Teaching, Jeremy L. Hsu, Melissa Rowland-Goldsmith

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

The transition to online learning in spring 2020 was abrupt for both students and instructors. While many instructors moved to asynchronous classes, some institutions relied more heavily on synchronous online courses. Here, we evaluate student perceptions of an inquiry‐based molecular biology lecture and lab course following this transition by comparing student survey responses from spring 2019, when the lecture and lab were fully in person, to spring 2020, when the lecture and lab started in person before transitioning to a synchronous online format. Students were asked to identify the main factors that supported their learning in lecture and lab, characterize …

Signal Transport And Rf Over Fiber Design For Alpaca, Erich Johannes Nygaard

Theses and Dissertations

The design of the RF over fiber signal transport system for the ALPACA receiver is described, with particular attention to the strict noise requirements as well as dynamic range considerations. Also discussed are analytical tools for analyzing dynamic range in the context of RFI-rich radio astronomy observational settings, including formulas for maximum interference to noise ratios and a simulation framework for predicting distortion levels. Phase and gain stability measurements of the signal transport system are presented, including the effects of the multi-strand armored fiber optic cable. The resulting system meets design requirements, with equivalent noise temperature below 900 K in …

Rsif Weekly Vol.1 No.28, Regional Scholarship And Innovation Fund (Rsif)

Rsif Newsletters

No abstract provided.

Bringing Classroom And Outside World Together: Mobile Instant Messaging Via Whatsapp© For Extracurricular Writing, Şakire Erbay Çetinkaya

The Qualitative Report

Mobile phones have a rapidly growing language teaching and learning potential due to various technologies and applications including instant messaging. However, the related literature mostly documents studies aiming at investigating their role for teaching vocabulary, pronunciation, and content, and thus there are calls to focus on other skills, including writing. Responding to these calls to solve the problem of research scarcity on other skills, I opted for a qualitative research design to investigate the pedagogical potential of WhatsApp©, perceive my students’ experiences, and evaluate the process with all strengths and weaknesses. I attempted to make contributions to the existing knowledge …

Distributed De Novo Assembler For Large-Scale Long-Read Datasets, Sayan Goswami, Kisung Lee, Seung Jong Park

Computer Science Faculty Research & Creative Works

Third-generation DNA sequencing technologies such as single-molecule real-time sequencing (SMRT) and nanopore sequencing have the potential to fill the gaps in the existing genome databases since the raw sequences produced by these machines are much longer than those of previous generations and therefore result in more contiguous assemblies. However, these long reads have a high error rate, which makes the assembly process computationally challenging. Moreover, since existing long-read assemblers are designed to run on a single machine, they either take days to complete or run out of memory on even moderate-sized datasets. In this paper, we present a distributed long-read …

Knowledge Mapping Of Alzheimer’S Disease Research: A Scientometric Analysis, Mamatha V, Dr Keshava

Library Philosophy and Practice (e-journal)

The paper explores the growth pattern of Alzheimer’s disease literature, published during 2014-2018. The data has been retrieved from the Web of Science database by using the keyword ‘Alzheimer’s Disease’. The downloaded articles were classified chronologically and transferred to a spreadsheet for the analysis as per the objectives of the study. The study results revealed that a total of 38936 publications were found out of which maximum publications (8355) were found in the year 2018 and the minimum 7192 publications were found in the year 2014. Mean relative growth rate of Alzheimer’s disease literature has shown exponential trend. Data set …

Dubai Taxi Demand Hotspots Prediction, Samer Kamal Abu Taleb

Theses

Public transportation mode like taxi service consider as an essential service in every city that can serve all gender, age, and level of people, used for to move at any time and everywhere inside or outside the city. with the new entrance of technology for transportation, the taxi industry is undergoing a rapid digital transition like many other fields, that include new inventory like Uber and Careem for taxi sharing used by smartphones. Most of the time, taxi vehicles' distribution is imbalanced due to passengers and taxi drivers' unorganized demand. The plan is always left to the driver to estimate …

Modeling Of Trihalomethanes In Benha Water Supply Network., Mohamed Basiouny, Tarek Elmitwalli Attia, Mohamed Ghazy

Mansoura Engineering Journal

The presence of total trihalomethane (THMs) in Benha Water Supply Network (WSN) is determined and evaluated in this research. Six sampling points located an Different distances from the main water reservoirs, were selected in BWSN in order to follow the evolution | THMs. The gained information from the monthly sampling and laboratory analysis program was used to formulate relationship of total trihalomethanes (THMs) concentration in terms of initial chlorine dose, total organic carbon, bromide ion concentration, contact time, temperature, algae. and pH. To define the accuracy level of the developed model. the predicted (Mx concentrations from the developed model were …

Synthesis Of Structurally Diverse Molecular Scaffolds Enabled By Protected Oxyallyl Cations, Joshua Andrew Malone

LSU Doctoral Dissertations

This dissertation focuses on the synthesis of diverse molecular scaffolds through the use of protected oxyallyl cation intermediates. Chapter One provides background on the generation and applications of oxyallyl and silyloxyallyl cations, while focusing on the direct nucleophilic capture of theses intermediates to generate functionalized ketones and silylenolates. Chapter Two depicts our approach to generate six-membered silyloxyallyl cations through the use of mild Brønsted acid activation. Regioselective nucleophilic capture of these intermediates successfully produced diverse a,a’-substituted silylenol ethers enabled by polar solvent and residual water.

Chapter three details strategies to generate 1,4-dicarbonyl compounds, focusing on the capture of cationic intermediates …

“Predictive Justice” And Legal Action-Opportunities And Challenges-An In-Depth Critical Study In The Anglo-Saxon And Latin Position, Prof. Mohamad Arfam Elkhatib

BAU Journal - Journal of Legal Studies - مجلة الدراسات القانونية

This research presents an original academic study that investigates, in an in-depth analytical methodology, one of the most controversial debate issues in the circles of the western, in particular the French, jurisprudence. In his respect, we mean the role of the predictive justice in substantiating the reliability of the legal action from the perspective of clarifying the opportunities that are provided by such justice for such reliability in the Anglo-Saxon and Latin jurisprudence, in addition to the available potentials of its success in increasing such reliability, for the objective of understanding the way of future approaching to such reliability and …